1.

If a,b,c are three non-coplanar vectors and if r is any vector then r =

Answer»

(R.a') a + (r.B') b + (r. C') c
(r.c') a + (r. b') b + (r. a') c
(r. a') a - (r. b') b - (r. c') c
(a.a') a + (b. b') b + (c. c') c

Answer :A


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